Crane



(No Model.) 2 sheets-sheet 2.

S. T. WELLMAN.

CRANE.

No. 302,180. P t ted Jul Y n @TJ en umljyii 7c ,45. .Si ...aux .Q

TINTTnn -STATss llDriTnNT Ormes.

SAMUEL T. VELLMAN, OF CLEVELAND, OHIO.

CRANE.

SPECIFICATION forming part of Letters Patent No. 302,180, dated July l5, 1884.

Application filed October 29, 1883. (Xo model.)

To @ZZ whom, it may concern/f Beit known that l, SAMUEL T. VELLMAN, of Cleveland, in thecounty of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Cranes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in steam or hydraulic cranes, the object being to provide a crane of such construction that the jib may be vertically moved by means of a chain or rope or wire cable extending through the mast and leading to a steam or hydraulic cylinder located under the ground or iloor.

Vith this end in view my invention consists lin certain features of construction and co1nbinations of parts, as will hereinafter be described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view partly in side elevation and partly in vertical section of acrane embodying my invention. Eig. 2 is an end view of the same.

u Fig. 3 is a view partly in transverse section and partly in plan of a portion of the crane.

vrotated in its bearing.

E is the jib, consisting of the parallel bars e e, forming trackways for the carriage E. The inner end of the Yjib is provided with a bearing, G, that is journaled upon the axle g, upon which rotates the wheels I-I H, located `at opposite sides of the bearing. Wheels H are provided with iianges 7L, andrun on trackways I I, located on one side of the mast of the crane.

J J are sleeve-bearings secured-to outer end of axle g, and are connected by diagonal rods or tubes j j, with similar bearings, K K, mounted upon opposite ends of the axle lf, which support the wheels L L, that run'upon the trackways I ou the opposite sideof the mast.

- M M are tension-bars, their upper ends being provided with collars m, which encircle the axle k, while their lower ends are screwthreaded, each passing through a perforated lug, Z, formed on a bracket, lL', attached to the jib, and by means of the nuts' Z Z2 any desired teiision may be imparted to the tensionbars. The bracket L is provided with a vertical arm, N, and the two brackets are connercted by a transverse bar, a. A chain-pulley or sprocket-wheel, O, is journaled in suitable brackets, o, secured to the upper end of the mast. .Around this wheel passes a chain, l?, one end of which is attached to the jib, while its opposite end is attached to a swivel, Q, the latter being secured to the upper end of a counter-weight, Q. This counter-weight is located between the two uprights of the mast, and is guided thereby.

To the lower end of the counter-weight Q `is secured a chain, R, 'which extends down through the hollow step E of the mast and down around the under side of the chain-pul' ley r, which is supported in bearings r', and thence partly around the chain-pulley s, the lower end of the chain being firmly secured to the hook s. Chain-pulley s is secured to an axle, s2, upon the opposite ends of which are mounted thetrack-wheels s3, which travel backward and forward on the tracks sf.

T is a steam or hydraulic cylinder, which, together with thechain-wheels r s, is located beneath the ground in a suitable chamber, T', of masonry, or beneath the floor of a building. Cylinder T is provided with a piston-rod, t,

having links t pivoted to its outer end, the

IOO

tive arrangement of parts, I will now briefly describe its operation. The jib of the crane is readily swung` around to any desired position, owing to the fact that the mast is supported in bearing at its upper and lower ends, and the further fact that the ball-and-socket joint for the step of the mast prevents the latter from binding, and it insures its free rotary movement under all conditions. The carriage F is then moved on the jib to a point over the load to be raised, which is connccted'to the carriage. Vater or steam is then admitted to -the cylinder T through the pipe X, and operatcs to drawrthe chain-pulley s toward the cylinder, which operation is facilitated by reason of the anti-friction link-bearings. As the chain-pulley s is drawn toward the cylinder T, the chain R is drawn down, and the chain P and the. liib elevated to any desired height, when the jib is rotated to any desired point, the carriage F moved. over a point where it is desired to deposit the load or weight, and then, by opening or regulating a valve, the steam or water is allowed to escape gradually,cansing the j ib to descend gradually the desired distance. The counter weight serves to partly counterbalance the `iib and parts connected therewith.

It is evident that many changes might be made in the construction of the different parts of the crane. and that the parts might be arranged in different ways without departing from the spirit of my invention, and hence I do not restrict myself to the exact construction and arrangement of parts shown and described; but,

Having fully described my invention, what I claim as new, and d esirc to secure by Letters Iatent, is-

l. In a steam-or hydraulic crane, the combination, with a rotary mast land a verticallyadjustable jib, of a steam or hydraulic cylinder situated below the mast, and a cable connected to the jib and extending downwardly through the mast, a'nd devices for connecting the cable with the cylinder.

2. In a steam or hydraulic crane, the combination, with a mast and a vertically-mov` able jib, of a pulley or sprocket-wheel journaled to the mast, chain wheels or pnlleysjournaled below the mast, a steam or hydraulic cylinder, a cable connected to thejib and passing downwardly through the mast, and devices, substantially as described, for transmitting motion from the cylinder to the j ib, substantially as set forth.

8. The combination, with a rotary mast and a vertically-movablcjib, of a chain passing upwardly through the mast, one end of said chain being connected to the jib for vertically elevating the same, and a motor connected to the chain. A

4. The colnbination, with a mast constructed substantially as described, and a vertically-adjustable jib, of chains connecting the j ib to the motor, and the counter-weight secured to the chains and guided by the side frame-pieces of the mast, substantially as set forth.

5. The combination, with the hollow step of the mast, of the self-adjusting bearing U, supported on the bed-plate IV, and anti-friction rollers u, interposed between the step of the mast and the bearing U, substantially as setl forth.

6. The combination, with a hollow mast, vertically-adjustable jib, and chain or cable, one end of which is connected to the jib, of the ehain-pulleys 0' s, track-wheel 3*, rails t, cylinder T, and-piston-rod and link, substantially as set forth.

7. The combination, with a mast constructed substantially as described, of the jib, wheels H, moving in contact with one face of the mast, wheels L, moving in contact with the opposite face of the mast, diagonal rods connecting the axles of the two sets of wheels, and tensioirv bars connecting the axle of the upper set of wheels with the jib, substantially as set forth.

8. The combination, with the mast and jib, ofthe lower set of wheels moving against one face of the mast, an upper set of wheels moving against the opposite face of the mast, di agonal rods connecting the two sets of wheels, the tension-bars connecting the axle of the up per wheels with the jib, the chains P and R, and

intermediate counter-weight, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

' SAMUEL T. VELLMAN.

Vitnesses:

Tiros. H. Bnoons, XV. H. SnnrARD. 

